Skip to content


Common Runtime

Whether you are developing jsii modules or consuming them (see Runtime Architecture), a compatible node runtime must be available. Current node runtime versions support status is as follows:

The following node releases are part of our test matrix:

Release Status End-of-Life
^18.0.0 ✅ Supported 2025-04-30
^20.0.0 ✅ Supported 2026-04-30
^22.0.0 ✅ Supported 2027-04-30
Status Definitions
  • ✅ Supported: Long Term Support (LTS) releases (those with an even major version) are supported and bugs specific to those releases are addressed with the highest priority. Every jsii release is automatically tested against those releases.
  • 🧪 Best effort: Development releases (those with an odd major version) are supported on a best-effort basis. Some of these releases may include breaking changes or bugs that may cause runtime errors that we may not be able to fix.

Releases not in the matrix might work, but are not guaranteed to: they can be considered to fall under the 🧪 Best Effort umbrella, unless they are end-of-life. Releases past end-of-life are unlikely to work, or may stop working with any future release.

The node releases schedule provides up-to-date information on the current status of all active releases, and indicates the timelines for support (including planned End-of-Life dates for each).

Other Languages

When developing jsii modules, the SDK for each desired target language must be available for jsii-pacmak to be able to produce releasable artifacts.

Language/Platform SDK Requirement
.NET .NET ≥ 6.0
Go Go ≥ 1.18
Java JDK ≥ 8 and Maven ≥ 3.6
Python Python ≥ 3.8

Download Locations

This table provides typical download locations for the prerequisites mentioned in this document. Most of these tools can also be installed using traditional package managers (standard for the operating system and platform).

Tool Description Location
.NET Official Microsoft .NET SDK distribution Download
Amazon Corretto Amazon's free OpenJDK distribution Download
Go Official Go distribution Download
Maven Official Maven distribution Download
Node Official Node.js distribution Download
OpenJDK Oracle OpenJDK distribution Download
Python Official Python distribution Download